[Gumstix-users] powering the roboaudiostix

I have a three board configuration: connex, roboaudio, netMMC. I
powered the setup via the power jack on the netMMC card with a regulated
5V supply. I am having trouble using the FFUART from the roboaudiostix
possibly because the 5V output only produces ~3.5V when powered this
way. Now I'm planning to power the configuration with a supply
connected to the roboaudiostix. Do I also need to power the netMMC
card?
When looking for info on the wiki I saw, "Some CF cards, combined with
the gumstix, require more than 500mA of current. In this situation, both
the CF board and the robostix must be powered. The CF board should be
powered with a regulated 5v source in this situation."
(http://docwiki.gumstix.org/Robostix_power) Which cards is this
referring to specifically?
Thank you,
Kelly

Thread view

I have a three board configuration: connex, roboaudio, netMMC. I
powered the setup via the power jack on the netMMC card with a regulated
5V supply. I am having trouble using the FFUART from the roboaudiostix
possibly because the 5V output only produces ~3.5V when powered this
way. Now I'm planning to power the configuration with a supply
connected to the roboaudiostix. Do I also need to power the netMMC
card?
When looking for info on the wiki I saw, "Some CF cards, combined with
the gumstix, require more than 500mA of current. In this situation, both
the CF board and the robostix must be powered. The CF board should be
powered with a regulated 5v source in this situation."
(http://docwiki.gumstix.org/Robostix_power) Which cards is this
referring to specifically?
Thank you,
Kelly

I powered the roboaudiostix with 8V (the supply is spec: 7.5V, measured:
8V). According to the wiki the roboaudiostix can handle up to 9V. It
was working fine yesterday and the first part of today, but now I don't
see the webserver to come up and can't ssh into the gumstix.
This issue seems to go away when I switch back to the other power supply
through the netMMC. The netMMC appears to be powered (the power LED is
on and the other LED flashes). =20
I am also hearing a high pitched whine that I don't remember. Not sure
if that is relevant.
Could this be a problem related to overheating? Any ideas?
-----Original Message-----
Date: Wed, 5 Sep 2007 19:19:17 -0700
From: "Dave Hylands" <dhylands@...>
Subject: Re: [Gumstix-users]=20
To: "General mailing list for gumstix users."
<gumstix-users@...>
Message-ID:
<c32efac40709051919wa806fclf19c4eafe50a9282@...>
Content-Type: text/plain; charset=3DISO-8859-1
Hi Kelly,
On 9/5/07, Seiler, Kelly <Kelly.Seiler@...> wrote:
> I have a three board configuration: connex, roboaudio, netMMC. I
> powered the setup via the power jack on the netMMC card with a
regulated
> 5V supply. I am having trouble using the FFUART from the
roboaudiostix
> possibly because the 5V output only produces ~3.5V when powered this
> way. Now I'm planning to power the configuration with a supply
> connected to the roboaudiostix. Do I also need to power the netMMC
> card?
You should be able to provide 5.5v (this is the ideal voltage) to the
roboaudiostix. 5v will work as well. You shouldn't neet to power the
netMMC (at least I don't when I use a robostix/connex/netMMC).
> When looking for info on the wiki I saw, "Some CF cards, combined with
> the gumstix, require more than 500mA of current. In this situation,
both
> the CF board and the robostix must be powered. The CF board should be
> powered with a regulated 5v source in this situation."
> (http://docwiki.gumstix.org/Robostix_power) Which cards is this
> referring to specifically?
Mostly WiFi cards. Regular CF flash card shouldn't require any extra
power.
>
> Thank you,
> Kelly
>
>
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--=20
Dave Hylands
Vancouver, BC, Canada
http://www.DaveHylands.com/

Hi Kelly,
On 9/5/07, Seiler, Kelly <Kelly.Seiler@...> wrote:
> I have a three board configuration: connex, roboaudio, netMMC. I
> powered the setup via the power jack on the netMMC card with a regulated
> 5V supply. I am having trouble using the FFUART from the roboaudiostix
> possibly because the 5V output only produces ~3.5V when powered this
> way. Now I'm planning to power the configuration with a supply
> connected to the roboaudiostix. Do I also need to power the netMMC
> card?
You should be able to provide 5.5v (this is the ideal voltage) to the
roboaudiostix. 5v will work as well. You shouldn't neet to power the
netMMC (at least I don't when I use a robostix/connex/netMMC).
> When looking for info on the wiki I saw, "Some CF cards, combined with
> the gumstix, require more than 500mA of current. In this situation, both
> the CF board and the robostix must be powered. The CF board should be
> powered with a regulated 5v source in this situation."
> (http://docwiki.gumstix.org/Robostix_power) Which cards is this
> referring to specifically?
Mostly WiFi cards. Regular CF flash card shouldn't require any extra power.
>
> Thank you,
> Kelly
>
> -------------------------------------------------------------------------
> This SF.net email is sponsored by: Splunk Inc.
> Still grepping through log files to find problems? Stop.
> Now Search log events and configuration files using AJAX and a browser.
> Download your FREE copy of Splunk now >> http://get.splunk.com/
> _______________________________________________
> gumstix-users mailing list
> gumstix-users@...
> https://lists.sourceforge.net/lists/listinfo/gumstix-users
>
--
Dave Hylands
Vancouver, BC, Canada
http://www.DaveHylands.com/